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외상이 경추 후종인대 골화증 환자의 수술결과에 미치는 영향
진동규,진병호,조용은,윤도흠,김영수,Chin, Dong-Kyu,Jin, Byung-Ho,Cho, Yong-Eun,Yoon, Do-Heum,Kim, Young-Soo 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.7
Objectives : Most cases of cervical ossification of the posterior longitudinal ligament(OPLL) present with myelopathy or myeloradiculopathy, which sometimes is further complicated by minor trauma to the spinal cord. The main purpose of surgery in these patients is the alleviation symptoms but also as protection against further deterioration. The purpose of this study is to analyze the influence of trauma on the surgical outcome in patients with cervical OPLL. Methods : Over the past 13 years, we have operated on 123 patients with myelopathy associated with cevical OPLL. Among these, thirty patients had cervical cord injury associated with major or minor trauma and their clinical and radiographic data were reviewed retrosepctively. Results : As to cause of trauma, seventeen were related with traffic accident and 13 were related with minor slipping injury. The pre- and post-operative motor power were significantly weaker in the patients with trauma, but the degree of motor improvement was significantly higher(trauma group : $0.90{\pm}1.49$, non-trauma group : $0.41{\pm}0.80$). Conclusion : These results indicate that even indirect minor trauma to the cervical spine can cause irreversible changes to the spinal cord if this is associated with underlying cervical stenosis with OPLL. Although less favorable results may be anticipated in patients with trauma, operative decompression could improve motor power and protect further deterioration.
순도를 달리한 알루미나 세라믹스의 분위기 압력변화에 따른 Tribology 특성
진동규,박흥식,서영백,옥철호,Jin, Dong-Gyu,Park, Heung-Sik,Seo, Yeong-Baek,Ok, Cheol-Ho 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.2
This study was undertaken to investigate tribological characteristics with atmospheric pressure for three alumina ceramics of different purity, such as, 85 %, 95 % and 99.7 %. The wear test was carried out using the wear test device which was designed for this study in air, $10^-2$ Torr and $10^-4$ Torr. The friction coefficient depends entirely on atmospheric pressure and alumina with lower purity than higher purity has been much affected by heat accumulation. The friction surface of ceramics have been protected in the air by the influence of the oxides transferred from STB2. However, the protective layer can not be formed due to the decrease of oxygen in vacuum.
Systematic review of the clinical and genetic aspects of Prader-Willi syndrome
진동규 대한소아청소년과학회 2011 Clinical and Experimental Pediatrics (CEP) Vol.54 No.2
Prader-Willi syndrome (PWS) is a complex multisystem genetic disorder that is caused by the lack of expression of paternally inherited imprinted genes on chromosome 15q11–q13. This syndrome has a characteristic phenotype including severe neonatal hypotonia,early-onset hyperphagia, development of morbid obesity, short stature, hypogonadism, learning disabilities, behavioral problems,and psychiatric problems. PWS is an example of a genetic condition caused by genomic imprinting. It can occur via 3 main mechanisms that lead to the absence of expression of paternally inherited genes in the 15q11.2–q13 region: paternal microdeletion, maternal uniparental disomy, and an imprinting defect. Over 99% of PWS cases can be diagnosed using DNA methylation analysis. Early diagnosis of PWS is important for effective long-term management. Growth hormone (GH) treatment improves the growth, physical phenotype, and body composition of patients with PWS. In recent years, GH treatment in infants has been shown to have beneficial effects on the growth and neurological development of patients diagnosed during infancy. There is a clear need for an integrated multidisciplinary approach to facilitate early diagnosis and optimize management to improve quality of life,prevent complications, and prolong life expectancy in patients with PWS.